<section class="top">
    <div class="logo logo_sys">
        <p><img src="images/logo.png" alt=""></p>
        <span>{$sys_name}</span>
    </div>
    <div class="logo logo_u">
        <span style="">
            <if condition="$username">
                Hi,{$username}
                <else/>
                {$lang.welcome}！
            </if>
        </span>
    </div>
    <div class="meb">
        <div class="logo logo_u">
            <span style="">
                <if condition="$username">
                    <a href="{:U('User/Index/logout')}" style="color: #b8fff4">退出</a>
                    <else/>
                    <a href="{:U('User/Index/login')}" style="color: #b8fff4">登陆/</a>
                    <a href="{:U('User/Index/login')}"style="color: #b8fff4">注册</a>
                </if>
            </span>
        </div>
    </div>
</section>